It's not an arrangement that most parents choose so much as one they succumb to under pressure
Dear Dr. Wolf,
I'd appreciate your views on the boyfriend/girlfriend sleepover. It's not unusual these days for older teens to expect their parents to allow them to have their boyfriend or girlfriend "sleep over," and sometimes practically move in to the family home. Many parents in my circle of friends permit this. In my own case, my 17-year-old daughter's father allows her to have her boyfriend sleep overnight in her room at his house. I don't permit boyfriend sleepovers at my house. Her boyfriend is welcome to visit and join us for family events, but sleeping in the same room is something that, in my mind, comes with being self-supporting. As a consequence, my daughter no longer stays at my house, preferring the greater sexual freedom she is allowed at her father's. Am I out of date, or will she thank me one day?
Dear Old-Fashioned Mom,
An eight-year-old girl bounces into her parents' room and asks: "Can my boyfriend sleep over in my room when I'm 17? Of course, we'll have sex when he's there."